## Summary
Keeps the queue metrics ClickHouse tests stable as wall-clock time
advances.
## Root cause
The fixtures used fixed timestamps. Once those timestamps crossed the
tables' 30-day retention boundary, ClickHouse immediately expired the
inserted aggregate rows and all six tests read empty results.
The fixtures now derive a recent minute-aligned timestamp once per test
file. The second 10-second bucket and ranking window are derived from
the same anchor, preserving deterministic bucket relationships while
keeping rows inside both the raw and aggregate table TTLs.
Verified with `pnpm --filter @internal/clickhouse exec vitest run
src/queueMetrics.test.ts`.
Chris Arderne
68ed809416